Alex Chilton's 1970s power-pop pioneers Big Star now sit alongside the Beatles and the Byrds in jangly guitar rock's canonical holy trinity. This four-disc set assembles arresting chimeras of their three albums from demos and remixes, disorientating dazzled devotees, and adds a sparsely attended live recording. Made in 1972, #1 Record smears syrupy Memphis soulfulness over a 1960s rock foundation that crackles with adolescent arrogance. Radio City (1974), with the perfect pop moment of September Gurls, sets